HSSK50 67317M intake valve?

Davisd2
I'm stuck. My Nomo snowblower ate a nail set and came to a stop and hasn't started since. The flywheel key was fine but I replaced it anyway. I'm getting exhaust out the carb so I replaced the intake valve with a new one and lapped it. But the gap is too big:.015 or so. I can't make the valve longer so what next? Camshaft is lined up with the crankshaft mark and I have a new head gasket. Why else would I be getting exhaust out the carb?
 
Thanks...

Excessive valve clearance will not cause exhaust out the intake; unless, the exhaust valve is not opening at all. From your description you had intake valve problem cause by a foreign object being ingested so I would be taking a serious look at the valve seat.

Okay Tecumseh engines are before my time repair wise. I started back in 2009 when they were becoming none existence in my area. BUt they should still be just any other L-head (side valve) engine.
 
Well this is a mess. Did you compare the new intake valve to the old one? If the valve seat is in place correctly the valve gap should be right; unless, it is the  wrong valve.  With that excess clearance the valve won't open; unless it is hanging open. But is something I would have thought you would seen when you did the valve lapping.
 
As for the compression being near zero, probably the best thing is to do a leak down test to find where the leak is actually at. As you suggest it might be a timing issue as I don't know if the crankshaft gear is keyed version or not. Maybe Roy will chime on this.
 
The problem is one that I personally need my hands to troubleshoot. As I would probably see the problem easily then.

Going to try a leak down test w a hacked compression tester

Pretty simple, it got stuck between the auger and the housing, stopping the auger. I bent it getting it out, so it was really stuck. I assumed at most I might have sheared key, but it's got me stuck now!

Davisd2
Is there any chance at all that the lobes on the camshaft can move? Are those pressed on?

The camshaft appear to be a forged version and pressed together.

 
so finally got back into the valves and the intake valve was sticking open. I guess that's what happens when you don't own a spring compressor and you use plastic ties instead! I reinstalled the intake valve and all is well. The leakdown test was the definitive test, thanks for the help!